How did Dred Scott cause tension between the northern and southern states?

The Supreme Court's sentence stated near or less followings:

- Dred Scott was a slave and then no US citizen. So he had no right of appeal to the Federal Justice;

- his stay in Territories where Missouri Compromise had forbidden the slavery meant but nothing because the Compromise had been void and without effect since its formulation in 1820, as the Congress had no power to legislate on slavery in the Territories;

- according to this thesis, the Territories were and remained open to any form of exploitation, with or without the slavery;

- The Missouri Compromise had been totally unconstitutional and unconstitutional

would be any future Congress's attempt to interfere about the matter of slavery in the western Territories.

That led to a huge raise of opposing and violent reactions both in the North and South, which neared the Nation to a conflict between the States.